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Finding the Fourth Proportional to 119,955,019.20, 179,932,528.80 and 74,605,387.20

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Solution

The fourth proportional to 119,955,019.20, 179,932,528.80 and 74,605,387.20 is: 111,908,080.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,955,019.20 : 179,932,528.80 = 74,605,387.20 : x
  2. Step 2: Convert to fraction form
    119,955,019.20/179,932,528.80 = 74,605,387.20/x
  3. Step 3: Cross multiply
    119,955,019.20x = 179,932,528.80 × 74,605,387.20
  4. Step 4: Simplify right side
    119,955,019.20x = 13,423,935,980,999,152
  5. Step 5: Solve for x
    x = 13,423,935,980,999,152/119,955,019.20
  6. Step 6: Final answer
    x = 111,908,080.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.